OSSP uuid is an ISO-C and Perl application programming interface (API)
and corresponding command line interface (CLI) for the generation of
DCE 1.1 and ISO/IEC 11578:1996 compliant Universally Unique Identifier
(UUID). It supports DCE 1.1 variant UUIDs of version 1 (time and node
based), version 3 (name based) and version 4 (random number based).

UUIDs are 128 bit numbers which are intended to have a high likelihood
of uniqueness over space and time and are computationally difficult
to guess. They are globally unique identifiers which can be locally
generated without contacting a global registration authority. UUIDs
are intended as unique identifiers for both mass tagging objects
with an extremely short lifetime and to reliably identifying very
persistent objects across a network.